JPS56132315A - Automatic focusing method - Google Patents

Automatic focusing method

Info

Publication number
JPS56132315A
JPS56132315A JP3520280A JP3520280A JPS56132315A JP S56132315 A JPS56132315 A JP S56132315A JP 3520280 A JP3520280 A JP 3520280A JP 3520280 A JP3520280 A JP 3520280A JP S56132315 A JPS56132315 A JP S56132315A
Authority
JP
Japan
Prior art keywords
peak value
signal
contrast signal
automatic focusing
sent
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP3520280A
Other languages
English (en)
Other versions
JPH0321892B2 (ja
Inventor
Masashi Kantani
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Fujifilm Holdings Corp
Original Assignee
Fuji Photo Film Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Fuji Photo Film Co Ltd filed Critical Fuji Photo Film Co Ltd
Priority to JP3520280A priority Critical patent/JPS56132315A/ja
Priority to US06/244,918 priority patent/US4422097A/en
Publication of JPS56132315A publication Critical patent/JPS56132315A/ja
Publication of JPH0321892B2 publication Critical patent/JPH0321892B2/ja
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
    • H04N23/60—Control of cameras or camera modules
    • H04N23/67—Focus control based on electronic image sensor signals
    • H04N23/673—Focus control based on electronic image sensor signals based on contrast or high frequency components of image signals, e.g. hill climbing method

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Automatic Focus Adjustment (AREA)
  • Focusing (AREA)
JP3520280A 1980-03-19 1980-03-19 Automatic focusing method Granted JPS56132315A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP3520280A JPS56132315A (en) 1980-03-19 1980-03-19 Automatic focusing method
US06/244,918 US4422097A (en) 1980-03-19 1981-03-18 Automatic focus controlling method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3520280A JPS56132315A (en) 1980-03-19 1980-03-19 Automatic focusing method

Publications (2)

Publication Number Publication Date
JPS56132315A true JPS56132315A (en) 1981-10-16
JPH0321892B2 JPH0321892B2 (ja) 1991-03-25

Family

ID=12435268

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3520280A Granted JPS56132315A (en) 1980-03-19 1980-03-19 Automatic focusing method

Country Status (2)

Country Link
US (1) US4422097A (ja)
JP (1) JPS56132315A (ja)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5895707A (ja) * 1981-12-02 1983-06-07 Olympus Optical Co Ltd 内視鏡の自動集点検出機構
EP0108626A2 (en) * 1982-11-05 1984-05-16 The British Library Board Improvements in and relating to document scanners
JP2002072074A (ja) * 2000-08-31 2002-03-12 Fuji Photo Film Co Ltd 自動焦点調節装置及び方法

Families Citing this family (30)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5813075A (ja) * 1981-07-16 1983-01-25 Fuji Photo Film Co Ltd ビデオカメラ用自動焦点調節装置
JPS5891410A (ja) * 1981-11-27 1983-05-31 Olympus Optical Co Ltd 撮像装置の合焦方法
JPS58123277A (ja) * 1982-01-19 1983-07-22 Asahi Optical Co Ltd ビデオカメラの自動焦点整合装置
US4531158A (en) * 1982-01-27 1985-07-23 Hitachi, Ltd. Automatic focusing system for video cameras
USRE33081E (en) * 1982-01-27 1989-10-03 Hitachi, Ltd. Automatic focusing system for video cameras
JPS59162514A (ja) * 1983-03-08 1984-09-13 Dainippon Screen Mfg Co Ltd 画像走査記録装置における焦点調整方法
JPS60120309A (ja) * 1983-12-02 1985-06-27 Canon Inc 自動焦点調節装置
JPS60183876A (ja) * 1984-03-02 1985-09-19 Konishiroku Photo Ind Co Ltd ビデオカメラのオ−トフオ−カス装置
JPS616612A (ja) * 1984-06-20 1986-01-13 Ricoh Co Ltd Ａｆ情報抽出方法
FR2575888B1 (fr) * 1985-01-04 1987-02-20 Thomson Csf Procede et dispositif de mise au point d'une camera et camera comportant un tel dispositif
JPH0783446B2 (ja) * 1985-05-16 1995-09-06 株式会社リコー ビデオカメラ等のオ−トフオ−カス装置
DE3537857A1 (de) * 1985-10-24 1987-05-07 Hell Rudolf Dr Ing Gmbh Optoelektronischer abtastkopf
FR2589253A1 (fr) * 1985-10-28 1987-04-30 Bioconcept Sarl Dispositif pour la mise au point automatique d'un microscope
IT1183983B (it) * 1985-11-29 1987-10-22 Elsag Sistema di acquisizione ed elaborazione flessibile di immagini
US4762986A (en) * 1986-03-10 1988-08-09 Canon Kabushiki Kaisha Automatic focussing system including in-focus position prediction means
KR890003567B1 (ko) * 1986-08-07 1989-09-23 주식회사 금성사 비디오 카메라의 자동초점 시스템
EP0280511B1 (en) * 1987-02-25 1996-08-14 Konica Corporation Still video camera
US4814889A (en) * 1987-10-07 1989-03-21 General Electric Company Automatic focussing system
US4789898A (en) * 1988-01-19 1988-12-06 Hughes Aircraft Company Demand auto focus driven by scene information only
US5005086A (en) * 1988-03-04 1991-04-02 Sony Corporation Focus control apparatus having two focusing speeds
US5083150A (en) * 1989-03-03 1992-01-21 Olympus Optical Co., Ltd. Automatic focusing apparatus
US5835143A (en) * 1993-09-02 1998-11-10 Asahi Kogaku Kogyo Kabushiki Kaisha Automatic focusing system for a still video camera
JP3338322B2 (ja) * 1997-02-25 2002-10-28 三洋電機株式会社 オートフォーカスカメラ
US8436932B2 (en) * 2005-04-22 2013-05-07 Hewlett-Packard Development Company, L.P. Focus target discrimination using multiple focus zones
US7702232B2 (en) * 2006-07-25 2010-04-20 Hewlett-Packard Development Company, L.P. Dynamic focus zones for cameras
US20080037977A1 (en) * 2006-08-11 2008-02-14 Premier Image Technology Corp. Focusing method of image capturing device
KR20100013859A (ko) * 2008-08-01 2010-02-10 삼성디지털이미징 주식회사 디지털 영상 처리기에서 렌즈의 ｍｔｆ 특성을 이용한포커스 조정 장치 및 방법
US20100259647A1 (en) * 2009-04-09 2010-10-14 Robert Gregory Gann Photographic effect for digital photographs
CN106125246A (zh) * 2016-07-19 2016-11-16 湖北三江航天红峰控制有限公司 一种自寻激光焦平面的方法
CN111948784B (zh) * 2020-07-07 2022-07-22 江苏大学 基于爬山法的迭代优化自动调焦方法

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS51105724A (ja) * 1975-03-14 1976-09-18 Yokogawa Electric Works Ltd
JPS5387221A (en) * 1977-01-12 1978-08-01 Ricoh Co Ltd Copier combined with transmitter
JPS5461922A (en) * 1977-10-26 1979-05-18 Toshihiko Kotsukawa Automatic focusing controller

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3211831A (en) * 1963-05-31 1965-10-12 Goodyear Aerospace Corp Automatic focus control system and method
US3621136A (en) * 1969-09-10 1971-11-16 Us Navy Automatic optical-focusing system for tv cameras
US3699251A (en) * 1971-09-27 1972-10-17 Us Navy Automatic optical probe focus apparatus
SE373214B (ja) * 1972-03-17 1975-01-27 B Olsen
US3967056A (en) * 1973-02-26 1976-06-29 Minolta Camera Kabushiki Kaisha Automatic focusing apparatus
DE2615841C3 (de) * 1976-04-10 1978-10-19 Fa. Carl Zeiss, 7920 Heidenheim Verfahren zum automatischen Nachführen der Scharfeinstellung eines mit einer Fernsehkamera ausgerüsteten Mikroskops
JPS53110823A (en) * 1977-03-10 1978-09-27 Ricoh Co Ltd Optical information processor

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS51105724A (ja) * 1975-03-14 1976-09-18 Yokogawa Electric Works Ltd
JPS5387221A (en) * 1977-01-12 1978-08-01 Ricoh Co Ltd Copier combined with transmitter
JPS5461922A (en) * 1977-10-26 1979-05-18 Toshihiko Kotsukawa Automatic focusing controller

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5895707A (ja) * 1981-12-02 1983-06-07 Olympus Optical Co Ltd 内視鏡の自動集点検出機構
EP0108626A2 (en) * 1982-11-05 1984-05-16 The British Library Board Improvements in and relating to document scanners
JP2002072074A (ja) * 2000-08-31 2002-03-12 Fuji Photo Film Co Ltd 自動焦点調節装置及び方法
JP4649715B2 (ja) * 2000-08-31 2011-03-16 富士フイルム株式会社 自動焦点調節装置

Also Published As

Publication number Publication date
JPH0321892B2 (ja) 1991-03-25
US4422097A (en) 1983-12-20

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